(a)Regressed SIOD Index on detrended Sea Surface Temperature (SST) (1958-2007). The western and eastern box used to calculate SIOD Index are indicated. Water temperatures in the southwestern Southern Indian Ocean are significantly higher than water temperature in the eastern part of South Indian Ocean, off Australia. In this image blue areas are colder than normal, while red areas are warmer than normal. (b)The normalized SIOD index during 1958-2007. The values are normalized by standard deviation of 0.65. Blue line indicates the original time series and the red curve are after applying 1-2-1 smoothing by ten times.
The Subtropical Indian Ocean Dipole (SIOD) is featured by the oscillation of sea surface temperatures (SST) in which the southwest Indian Ocean i.e. south of Madagascar is warmer and then colder than the eastern part i.e. off Australia.[1] It was first identified in the studies of the relationship between the SST anomaly and the south-central Africa rainfall anomaly; the existence of such a dipole was identified from both observational studies and model simulations[2]
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^Behera SK, Yamagata T. 2001. Subtropical SST dipole events in the southern Indian Ocean, Geophysical Research Letters 28: 327–330.
^Behera SK, P.S. Salvekar, and Yamagata T. 2000. Simulation of interannual SST variability in the tropical Indian Ocean, J. Clim, 13, 3487-3499.
and 23 Related for: Subtropical Indian Ocean Dipole information
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The SubtropicalIndianOceanDipole (SIOD) is featured by the oscillation of sea surface temperatures (SST) in which the southwest IndianOcean i.e. south...
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Glossary - Monsoon". Indian Meteorological Department. Retrieved 5 March 2011. Gopal Raj, N (4 May 2004). "El Nino & the IndianOceanDipole". The Hindu. "Climate...
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